Commit 8c8d0f00 authored by Atish Patra's avatar Atish Patra Committed by Anup Patel
Browse files

drivers/perf: riscv: Add SBI v3.0 flag 



There are new PMU related features introduced in SBI v3.0.
1. Raw Event v2 which allows mhpmeventX value to be 56 bit wide.
2. Get Event info function to do a bulk query at one shot.

Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
Signed-off-by: default avatarAtish Patra <atishp@rivosinc.com>
Acked-by: default avatarPaul Walmsley <pjw@kernel.org>
Link: https://lore.kernel.org/r/20250909-pmu_event_info-v6-1-d8f80cacb884@rivosinc.com


Signed-off-by: default avatarAnup Patel <anup@brainfault.org>
parent 5c6d333a

drivers/perf/riscv_pmu_sbi.c

+4 −0
Original line number Diff line number Diff line
@@ -63,6 +63,7 @@ PMU_FORMAT_ATTR(event, "config:0-47"); 
PMU_FORMAT_ATTR(firmware, "config:62-63");



static bool sbi_v2_available;

static bool sbi_v3_available;

static DEFINE_STATIC_KEY_FALSE(sbi_pmu_snapshot_available);

#define sbi_pmu_snapshot_available() \

	static_branch_unlikely(&sbi_pmu_snapshot_available)
@@ -1452,6 +1453,9 @@ static int __init pmu_sbi_devinit(void) 
	if (sbi_spec_version >= sbi_mk_version(2, 0))

		sbi_v2_available = true;



	if (sbi_spec_version >= sbi_mk_version(3, 0))

		sbi_v3_available = true;



	ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_RISCV_STARTING,

				      "perf/riscv/pmu:starting",

				      pmu_sbi_starting_cpu, pmu_sbi_dying_cpu);